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/*
* KENLM.h
*
* Created on: 4 Nov 2015
* Author: hieu
*/
#pragma once
#include <boost/shared_ptr.hpp>
#include <boost/bind.hpp>
#include <boost/thread.hpp>
#ifdef __linux
#include <pthread.h>
#endif
#include "../FF/StatefulFeatureFunction.h"
#include "lm/model.hh"
#include "../legacy/Factor.h"
#include "../legacy/Util2.h"
#include "../Word.h"
#include "../TypeDef.h"
namespace Moses2
{
class Word;
class GPULM: public StatefulFeatureFunction
{
public:
GPULM(size_t startInd, const std::string &line);
virtual ~GPULM();
virtual void Load(System &system);
void SetParameter(const std::string& key,
const std::string& value);
virtual FFState* BlankState(MemPool &pool, const System &sys) const;
//! return the state associated with the empty hypothesis for a given sentence
virtual void EmptyHypothesisState(FFState &state, const ManagerBase &mgr,
const InputType &input, const Hypothesis &hypo) const;
virtual void
EvaluateInIsolation(MemPool &pool, const System &system, const Phrase<Moses2::Word> &source,
const TargetPhraseImpl &targetPhrase, Scores &scores,
SCORE &estimatedScore) const;
virtual void
EvaluateInIsolation(MemPool &pool, const System &system, const Phrase<SCFG::Word> &source,
const TargetPhrase<SCFG::Word> &targetPhrase, Scores &scores,
SCORE &estimatedScore) const;
virtual void EvaluateWhenApplied(const ManagerBase &mgr,
const Hypothesis &hypo, const FFState &prevState, Scores &scores,
FFState &state) const;
virtual void EvaluateWhenApplied(const SCFG::Manager &mgr,
const SCFG::Hypothesis &hypo, int featureID, Scores &scores,
FFState &state) const;
virtual void EvaluateWhenAppliedBatch(
const System &system,
const Batch &batch) const;
protected:
std::string m_path;
FactorType m_factorType;
util::LoadMethod m_load_method;
const Factor *m_bos;
const Factor *m_eos;
size_t m_order;
inline lm::WordIndex TranslateID(const Word &word) const {
std::size_t factor = word[m_factorType]->GetId();
return (factor >= m_lmIdLookup.size() ? 0 : m_lmIdLookup[factor]);
}
std::vector<lm::WordIndex> m_lmIdLookup;
// batch
void CreateNGram(std::vector<std::pair<Hypothesis*, Context> > &contexts, Hypothesis &hypo) const;
void ShiftOrPush(std::vector<const Factor*> &context,
const Factor *factor) const;
SCORE Score(const Context &context) const;
};
}
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